Yes Bill/ Bpffin was the standard twin power operated 20mm guns, and was adapted for a single 40mm gun. This was done to give all RN ships more hitting power for the Pacific theatre.
_________________
![[ img ]](http://i.imgur.com/NzXKKp6.png)
Thank you Kim for the crest
"Never fear to try on something new. Remember that the Titanic was built by professionals, and the Ark by an amateur"